Crack-arrest behavior in SEN (single-edge notch) wide plates of quenched and tempered A 533 grade B steel tested under nonisothermal conditions
Technical Report
·
OSTI ID:6122373
The first series of six wide-plate crack-arrest tests (WP-1 Series) are discussed in this report. Each test utilized a 1-m x 1-m x 0.1-m-thick single-edge notch specimen (a/w = 0.2), fabricated from A533 grade B class 1 steel, that was subjected to a linear thermal gradient along the plane of crack propagation. The tests were conducted at the National Bureau of Standards (Gaithersburg) and were designed to provide fracture-toughness measurements at temperatures approaching or above the onset of the Charpy upper-shelf regime, in a rising toughness region and with an increasing driving force. Results from this series of tests produced crack-arrest toughness values well above the limit recognized by current ASME Code guidelines (220 MPa . ..sqrt..m) with arrest occurring at 52/sup 0/C to 115/sup 0/C above the material RT/sub NDT/ (-23/sup 0/C). The fracture data support: (1) the use of current LEFM concepts to analyze cleavage run-arrest events, (2) the treatment of cleavage run-arrest and ductile fracture modes as separate events, and (3) the fact that cleavage arrest occurs above the ASME limit. 115 figs., 20 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Regulatory Research
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6122373
- Report Number(s):
- NUREG/CR-4930; ORNL-6388; ON: DE88001596
- Country of Publication:
- United States
- Language:
- English
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